Crow Hunter-

You hit the nail on the head about requiring more magnification in low light than in strong daylight. When people ask about low-light performance, I see many replies recommending "a good 2x or 3x." While that may be OK for very short distances, it would not have worked for any of the moonlight shots I have made in the past couple of years. Rarely do I use anything as low as 8x, and most times, it's 10x or more.